Pencil.



A. P. JACOB.

PENCIL.

APPLIGATION FILED 00T.1o, 1912.

1,068,057, Patented my 22, 1913.

UNITED STATES PATENT ALFRED P. JACOB, OF NEW YORK, N. Y.

PENCIL.

-Application led October 10, 1912. Serial No. 725,035.

To all whom t may concern Be it known .that I, ALFRED P. JACOB, acitizen of the United States, and resident of the borough of Bronx, inthe city and State oil New York, have invented a new and useiulimprovement in Pencils, of which the following is a specification.

The object of my invention is to provide certain improvements in thattype of pencil in which the rod of marking material is re movably heldwithin the pencil holder.

My invention comprises more particularly a compressible sleevesurrounding the rod of marking material, to which Sleeve direct lateralpressure is applied for the purpose ot gripping and holding said rod.

A. practical embodiment of the invention is represented in theaccompanying drawings, in which,

Figure i is a view in side elevation of a portion oli a pencil embodyingmy invention, Fig. 2 is a central longitudinal section of the same, Fig.3 is a similar section with the tip removed, and Fig. It is a crosssection taken in the plane of the line A-A of Fig. 2.

The rod of marking material is denoted by l, and the tubular holder isdenoted by Q. ik hollow stem has its enlarged portion 3, secured withinthe tubular holder 2, which stem has a reduced exteriorly screw-threadedportion 4t, a seat portion and `a pronged extension. l have shown thispronged eX- tensi'on as comprising four prongs having thin Shanks 5 andeXteriorly tapered heads 6. The stem 3 is provided with a seat 7 leadingrearwardly from the pronged eX- tension. A sleeve 8, of compressiblematerial, Ipreferably elastic material, such, for example, as rubber orcork. surrounds the rod l of marking material within the prongedextension ot' the hollow stem 3. This compressible sleeve 8 is heldagainst unintentional removal by forcing its back end into the seat 'l'.

The tip 9 is provided with a screw-threaded portion l0, at its back endarranged to engage the screw-threaded portion e of the stem 3, forremovably securing the tip to the pencil holder. This tip isfurthermore,

provided with a tapered portion 11 arranged to engage the tapered heads6 of the pronged extension ot the stem 3, for forcing the said headsinwardly as the tip is screwed Specification of Letters Patent. i p

Patented July 22, 1913.

rearwardly for compressing the sleeve S laterally to cause it to gripand hold the rod l of marking material firmly within the holder.

By forming the prongs with enlarged heads and reduced shanks and formingthe prongs normally spread outwardly, I am enabled to procure anextended lateral pres- ,sure on the sleeve 8, and thereby an extendedgripping engagement of the sleeve along the rod of marking material. Thereduced bore 12 in the stem 3, is made slightly larger in diameter thanthe diameter of the rod of marking material, and the front opening inthe removable tip 9 is made slightly reater in diameter than thediameter of t e said rod, so that a slight lateral yielding of the rodmay be obtained when the pencil is in use to eliminate as far aspossible, the tendency to break the rod by an oblique pressure on itspoint.

It is evident that various changes might be resorted to in theconstruction, form and arrangement of the several parts withoutdeparting from the spirit and scope of my invention; hence l do not wishto limit myself strictly to thel structure herein described, but

W'hat I claim is:

15A pencil including a rod of marking material, a compressible sleevesurrounding said rod and laterally movable means sur rounding saidsleeve and arranged to exert direct lateral pressure thereon for causingit to grip and hold the rod.

2. A pencil including a rod of marking material, a compressible-sleevesurrounding said rod and laterally movable means surrounding said sleeveand arranged to exert extended direct lateral pressure thereon forcausing it to grip and hold the rod.

3. A pencil including a rod of marking material, a hollow stem having apronged extension, a compressible sleeve surrounding said rod withinsaidpronged extension and means for exerting lateral pressure on saidpronged extension for causing the sleeve to be compressed laterally togrip and hold the rod.

4. A pencil including a rod or marking material, a hollow stem having apronged extension, a compressible sleeve surrounding said rod withinsaid pronged extension, and means for exerting extended lateral pressureon said pronged extension to cause it to exert extended lateral pressureon said sleeve for causing the sleeve to grip and hold the rod.

5. A pencil including a rod 0f marking material, a hollow stem having apronged extension and a seat extended rearwardly therefrom, aoompressible sleeve surrounding said rod and located within said seatand said pronged extension, and means for exerting lateral pressure onsaid pronged extension for causing the sleeve to grip and hold said rod.

6. A pencil includin a rod of marking material, a tubular ho der, ahollow stem therein having a pronged extension', a compressible sleevesurrounding said rod within said pronged extension and a tubular tipengaging sald pronged extension and having a screw-threaded engagementwith said stem for forcing said pronged extension inwardly to compressthe sleeve laterally for causing itv to grip and-hold the rod.

7. A pencil including a rod of marking material, a tubular holder, ahollow stem therein having a pronged extension and a seat extendedrearwardly therefrom, a compressible sleeve surrounding said rod andlocated within said seat and said pronged extension and a tubular tipengaging said pronged extension and having a screwthreaded engagementwith said stem for forcing sald pronged extension inwardly to compressthe sleeve laterally for causing it to grip and hold said rod! 8. Apencil including a rod of marking material, a hollow stem having apronged extension, said prongs having tapered heads and reduced Shanks,a compressible sleeve surrounding said rod within said pronged extensionand a tubulartip having a tapered portion engaging said tapered heads ofthe prongs and having a screw-threaded engagement with said stem forforcing said rongs inwardly to compress the sleeve latera ly for causingit to grip and hold the said rod.

9. A pencil including a rod of marking material, a tubular holder, ahollow stem having an enlarged portion secured within the holder, areduced eXteriorly screwthreaded portion and a pronged extension, acompressible sleeve surrounding said rod within said pronged extensionand a hollow tip engaging said pronged extension and said screw-threadedortion for forcing the said pronged extension inwardly to compress thesleeve laterally for causing it to grip and hold said rod.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two witnesses, this ninth day of October 1912.

ALFRED P. JACOB. Witnesses:

` F. GEORGE BARRY,

HENRY C. THIEME.

